@misc{indiciaeb55dbacb1c2f,
  title = {Variation in human fertility.},
  author = {O Mayo and M M Nelson and J O Forfar},
  year = {1973},
  doi = {10.1159/000152605},
  url = {https://pubmed.ncbi.nlm.nih.gov/4785871/},
  note = {Source identifier: 4785871}
}